The i7 920 is a better option, especially since there is no performance difference to be had from going to the 965. And yes, get the fastest RAM kit you can from the big three i.e. Corsair, Crucial or OCZ.

what would you says better the Blade series, the Reaper HPC series,
or then there's Dominator that gomes with the fan or there's the DominatorGT then i could buy the fan as extra anyway
I could go a bit over the top and get the OCZ Flex series and water cool all the RAM thoughts